Currently Goldfish/Koi and Sunfish. I also have bullfrogs. I love the bullfrogs. I've been thinking of adding a catfish, but I don't want something that is going to eat my frogs. I was going to visit a local pond and catch one a foot or less. I'm guessing this is frowned upon,but theoretically is there a catfish that can co-exist? I've had small bass before, I'm thinking of this. It will be a few years before they would eat the frogs. Is there an online option to buy something appropriate?